<I have tracked a list of all M6 Classic 0.85 serial numbers. I have 400 or of of the 3130 serial numbers that Leica claims to have made. But tracking it by year, from Customer input data seems useless. It is enough to track it by country of origin and engraving on the back. > 
 
Frank:
 
If I may ask, what is the purpose of your research?
 
Regards:
 
Gilbert
	
		
			
		
		
	
				
			Frank:
If I may ask, what is the purpose of your research?
Regards:
Gilbert